{
  "rubric": "Help the train move forward by typing the right answer to score, then click on the balloon and drop it on the correct wagon.",
  "attempts": "2",
  "Questions": [
    [
      "Q1 __________________ is anything that occupies space and has weight.",
      "Matter"
    ],
    ["Q2 Atoms of the same kind form an __________________.", "element"],
    [
      "Q3 Molecules are separated by large empty spaces in __________________.",
      "gases"
    ],
    [
      "Q4 When one liquid dissolves in another, both are said to be __________________.",
      "miscible"
    ],
    [
      "Q5 The bubbles in aerated drinks are formed because of the presence of __________________.",
      "carbon dioxide"
    ]
  ]
}